This Dana octopus squid followed the ROV down for a while. Notice the bioluminescent spotlights on the tips of two of its arms.
Dana Octopus Squid
Image courtesy of the NOAA Office of Ocean Exploration and Research, Mountains in the Deep: Exploring the Central Pacific Basin. Download larger version (jpg, 1.3 MB).

This Dana octopus squid followed the ROV down for a while. Notice the bioluminescent spotlights on the tips of two of its arms.

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